def make_headers(count, header=None):
if header is None:
last_hash = HASH_INITIAL_BLOCK
else:
last_hash = header.hash()
tweak = last_hash
headers = []
for i in range(count):
headers.append(
BlockHeader(version=1,
previous_block_hash=last_hash,
merkle_root=make_hash(i, tweak),
timestamp=GENESIS_TIME + i * 600,
difficulty=DEFAULT_DIFFICULTY,
nonce=i * 137))
last_hash = headers[-1].hash()
return headers
def get_blockheader_with_transaction_hashes(self, block_hash):
URL = "%s/api/block/%s" % (self.base_url, b2h_rev(block_hash))
r = json.loads(urlopen(URL).read().decode("utf8"))
version = r.get("version")
previous_block_hash = h2b_rev(r.get("previousblockhash"))
merkle_root = h2b_rev(r.get("merkleroot"))
timestamp = r.get("time")
difficulty = int(r.get("bits"), 16)
nonce = int(r.get("nonce"))
tx_hashes = [h2b_rev(tx_hash) for tx_hash in r.get("tx")]
blockheader = BlockHeader(version, previous_block_hash, merkle_root, timestamp, difficulty, nonce)
if blockheader.hash() != block_hash:
return None, None
calculated_hash = merkle(tx_hashes, double_sha256)
if calculated_hash != merkle_root:
return None, None
blockheader.height = r.get("height")
return blockheader, tx_hashes
